package com.example.news;

import android.content.ComponentCallbacks;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class NewsTitleFragment extends Fragment {
    private boolean isTwoPane;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view= inflater.inflate(R.layout.news_title_frag,container,false);
        RecyclerView newsTitleRecyclerView= view.findViewById(R.id.news_title_recycler_view);
        LinearLayoutManager layoutManager=new LinearLayoutManager(getActivity());
        newsTitleRecyclerView.setLayoutManager(layoutManager);
        NewsAdapter adapter=new NewsAdapter(getNews());
        newsTitleRecyclerView.setAdapter(adapter);
        return view;
    }

    private List<News> getNews(){
        List<News> newsList=new ArrayList<>();
        for(int i=1;i<=50;i++){
            News news=new News();
            news.setTitle("This is news title"+i);
            news.setContent(getRandomLengthContent("This is news content"+i+"."));
            newsList.add(news);
        }return newsList;
    }

    private String getRandomLengthContent(String content){
        Random random=new Random();
        int length=random.nextInt(20)+1;
        StringBuilder builder=new StringBuilder();
        for(int i=0;i<length;i++){
            builder.append(content);
        }return builder.toString();
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState){
        super.onActivityCreated(savedInstanceState);
        isTwoPane= getActivity().findViewById(R.id.news_content_layout) != null;
    }

    class NewsAdapter extends RecyclerView.Adapter<NewsAdapter.ViewHolder> {
        private final List<News> mNewsList;
        class ViewHolder extends RecyclerView.ViewHolder{
            TextView newsTitleText;
            public ViewHolder(View view){
                super(view);
                newsTitleText= view.findViewById(R.id.news_title);
            }
        }
        public NewsAdapter(List<News> newsList){
            mNewsList=newsList;
        }
        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.news_item, parent, false);
            final ViewHolder holder = new ViewHolder(view);
            view.setOnClickListener(v -> {
                News news=mNewsList.get(holder.getAdapterPosition());
                if(isTwoPane){
                    assert getFragmentManager() != null;
                    NewsContentFragment newsContentFragment=(NewsContentFragment) getFragmentManager().findFragmentById(R.id.news_content_fragment);
                    newsContentFragment.refresh(news.getTitle(),news.getContent());
                }else{
                    NewsContentActivity.actionStart(getActivity(),news.getTitle(),news.getContent());
                }
            });
            return holder;
        }
        @Override
        public void onBindViewHolder(ViewHolder holder,int position){
            News news=mNewsList.get(position);
            holder.newsTitleText.setText(news.getTitle());
        }
        @Override
        public int getItemCount(){
            return mNewsList.size();
        }
    }
}